3222fcdb60ac187e0f302064e159211e6ed17d8b98d8a9afd2dccd59e6fc6864

Analysis

max time kernel
9s
max time network
42s
platform
windows7_x64
resource
win7v20210410
submitted
13/06/2021, 09:31

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General

Target

updatewin1.exe
Size

272KB
MD5

5b4bd24d6240f467bfbc74803c9f15b0
SHA1

c17f98c182d299845c54069872e8137645768a1a
SHA256

14c7bec7369d4175c6d92554b033862b3847ff98a04dfebdf9f5bb30180ed13e
SHA512

a896acc38a6ff9641b0803f0598369c0d4fa8e38da28c1653c57948fe5e3274880d1b2e7959cd1b1da43375a1318b3ba72e13240bf40b27c852ee72bbb16cadc

Score

10^/10

evasion

Malware Config

Signatures

Deletes Windows Defender Definitions 2 TTPs 1 IoCs

Uses mpcmdrun utility to delete all AV definitions.

evasion

Impair Defenses

T1562

Command-Line Interface

T1059

pid	Process
1816	mpcmdrun.exe

Disables Task Manager via registry modification
evasion

Deletes itself 1 IoCs

pid	Process
1424	cmd.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1308	powershell.exe
1308	powershell.exe
1308	powershell.exe
1500	powershell.exe
1500	powershell.exe
1724	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1308	powershell.exe
Token: SeDebugPrivilege	1500	powershell.exe
Token: SeDebugPrivilege	1724	powershell.exe

Suspicious use of WriteProcessMemory 39 IoCs

description	pid	Process	procid_target
PID 1672 wrote to memory of 1356	1672	updatewin1.exe	26
PID 1672 wrote to memory of 1356	1672	updatewin1.exe	26
PID 1672 wrote to memory of 1356	1672	updatewin1.exe	26
PID 1672 wrote to memory of 1356	1672	updatewin1.exe	26
PID 1672 wrote to memory of 1356	1672	updatewin1.exe	26
PID 1672 wrote to memory of 1356	1672	updatewin1.exe	26
PID 1672 wrote to memory of 1356	1672	updatewin1.exe	26
PID 1356 wrote to memory of 1308	1356	updatewin1.exe	27
PID 1356 wrote to memory of 1308	1356	updatewin1.exe	27
PID 1356 wrote to memory of 1308	1356	updatewin1.exe	27
PID 1356 wrote to memory of 1308	1356	updatewin1.exe	27
PID 1356 wrote to memory of 1308	1356	updatewin1.exe	27
PID 1356 wrote to memory of 1308	1356	updatewin1.exe	27
PID 1356 wrote to memory of 1308	1356	updatewin1.exe	27
PID 1356 wrote to memory of 1500	1356	updatewin1.exe	29
PID 1356 wrote to memory of 1500	1356	updatewin1.exe	29
PID 1356 wrote to memory of 1500	1356	updatewin1.exe	29
PID 1356 wrote to memory of 1500	1356	updatewin1.exe	29
PID 1356 wrote to memory of 1500	1356	updatewin1.exe	29
PID 1356 wrote to memory of 1500	1356	updatewin1.exe	29
PID 1356 wrote to memory of 1500	1356	updatewin1.exe	29
PID 1500 wrote to memory of 1724	1500	powershell.exe	34
PID 1500 wrote to memory of 1724	1500	powershell.exe	34
PID 1500 wrote to memory of 1724	1500	powershell.exe	34
PID 1500 wrote to memory of 1724	1500	powershell.exe	34
PID 1500 wrote to memory of 1724	1500	powershell.exe	34
PID 1500 wrote to memory of 1724	1500	powershell.exe	34
PID 1500 wrote to memory of 1724	1500	powershell.exe	34
PID 1356 wrote to memory of 1816	1356	updatewin1.exe	36
PID 1356 wrote to memory of 1816	1356	updatewin1.exe	36
PID 1356 wrote to memory of 1816	1356	updatewin1.exe	36
PID 1356 wrote to memory of 1816	1356	updatewin1.exe	36
PID 1356 wrote to memory of 1424	1356	updatewin1.exe	38
PID 1356 wrote to memory of 1424	1356	updatewin1.exe	38
PID 1356 wrote to memory of 1424	1356	updatewin1.exe	38
PID 1356 wrote to memory of 1424	1356	updatewin1.exe	38
PID 1356 wrote to memory of 1424	1356	updatewin1.exe	38
PID 1356 wrote to memory of 1424	1356	updatewin1.exe	38
PID 1356 wrote to memory of 1424	1356	updatewin1.exe	38

C:\Users\Admin\AppData\Local\Temp\updatewin1.exe
"C:\Users\Admin\AppData\Local\Temp\updatewin1.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1672
- C:\Users\Admin\AppData\Local\Temp\updatewin1.exe
  "C:\Users\Admin\AppData\Local\Temp\updatewin1.exe" --Admin
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:1356
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -Command Set-ExecutionPolicy -Scope CurrentUser RemoteSigned
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1308
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    powershell -NoProfile -ExecutionPolicy Bypass -Command "& {Start-Process PowerShell -ArgumentList '-NoProfile -ExecutionPolicy Bypass -File ""C:\Users\Admin\AppData\Local\script.ps1""' -Verb RunAs}"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:1500
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\script.ps1
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1724
- - C:\Program Files\Windows Defender\mpcmdrun.exe
    "C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all
    3⤵
    - Deletes Windows Defender Definitions
    PID:1816
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat""
    3⤵
    - Deletes itself
    PID:1424

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Privilege Escalation

Defense Evasion

Impair Defenses

T1562

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1308-79-0x00000000057D0000-0x00000000057D1000-memory.dmp

Filesize
4KB

Download
memory/1308-93-0x000000007EF30000-0x000000007EF31000-memory.dmp

Filesize
4KB

Download
memory/1308-87-0x00000000062D0000-0x00000000062D1000-memory.dmp

Filesize
4KB

Download
memory/1308-70-0x0000000004972000-0x0000000004973000-memory.dmp

Filesize
4KB

Download
memory/1308-69-0x0000000004970000-0x0000000004971000-memory.dmp

Filesize
4KB

Download
memory/1308-71-0x0000000005360000-0x0000000005361000-memory.dmp

Filesize
4KB

Download
memory/1308-68-0x00000000026E0000-0x00000000026E1000-memory.dmp

Filesize
4KB

Download
memory/1308-66-0x0000000001F20000-0x0000000001F21000-memory.dmp

Filesize
4KB

Download
memory/1308-80-0x0000000006340000-0x0000000006341000-memory.dmp

Filesize
4KB

Download
memory/1308-67-0x00000000049B0000-0x00000000049B1000-memory.dmp

Filesize
4KB

Download
memory/1308-74-0x0000000005770000-0x0000000005771000-memory.dmp

Filesize
4KB

Download
memory/1356-65-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1500-94-0x00000000020C0000-0x0000000002D0A000-memory.dmp

Filesize
12.3MB

Download
memory/1500-95-0x0000000002730000-0x0000000002731000-memory.dmp

Filesize
4KB

Download
memory/1500-105-0x0000000005850000-0x0000000005851000-memory.dmp

Filesize
4KB

Download
memory/1500-97-0x0000000005420000-0x0000000005421000-memory.dmp

Filesize
4KB

Download
memory/1500-92-0x00000000048A0000-0x00000000048A1000-memory.dmp

Filesize
4KB

Download
memory/1500-91-0x0000000002410000-0x0000000002411000-memory.dmp

Filesize
4KB

Download
memory/1672-64-0x0000000000400000-0x000000000044D000-memory.dmp

Filesize
308KB

Download
memory/1672-59-0x0000000075721000-0x0000000075723000-memory.dmp

Filesize
8KB

Download
memory/1724-121-0x0000000005820000-0x0000000005821000-memory.dmp

Filesize
4KB

Download
memory/1724-114-0x00000000049F0000-0x00000000049F1000-memory.dmp

Filesize
4KB

Download
memory/1724-116-0x0000000005420000-0x0000000005421000-memory.dmp

Filesize
4KB

Download
memory/1724-117-0x0000000004A90000-0x0000000004A91000-memory.dmp

Filesize
4KB

Download
memory/1724-118-0x0000000004A92000-0x0000000004A93000-memory.dmp

Filesize
4KB

Download
memory/1724-110-0x0000000001FE0000-0x0000000001FE1000-memory.dmp

Filesize
4KB

Download
memory/1724-124-0x0000000005910000-0x0000000005911000-memory.dmp

Filesize
4KB

Download
memory/1724-126-0x000000007EF30000-0x000000007EF31000-memory.dmp

Filesize
4KB

Download
memory/1724-137-0x00000000064A0000-0x00000000064A1000-memory.dmp

Filesize
4KB

Download
memory/1724-138-0x00000000064B0000-0x00000000064B1000-memory.dmp

Filesize
4KB

Download